Two laning with paved shoulder / Four laning of Tamil Nadu / Karnataka Border to Bangalore section of NH-209 from km 266.530 to km 458.52 in the State of Karnataka under NHDP Ph IV on DBFOT (Toll) basis

A Concessio ID is a 12-character canonical identifier for an infrastructure concession. The format is CC-AA-S-NNNNNN-K — country, asset class, structure, sequence, and a Luhn check digit. The check digit protects against typos and fabricated IDs.

Concessio IDs are stable for the life of the concession. They do not change if the asset is renamed, sold, or restructured. Cite them in filings, press releases, research reports, and contracts.